Johanna waited at the bus stop for nearly an hour ___ the bus finally arrived.
| A．when | B．unless | C．before | D．after |
-I give up．It’s too hard．
-Really? I______you could make it through．
| A．think | B．thought | C．have thought | D．am thinking |
The bell rang and every student had to_________their examination papers．
| A．give up | B．give away | C．give out | D．give in |
_____60 miles a day，you need your mountain bike in a very good state.
| A．Cover | B．Covered | C．To cover | D．Having covered |
-Did you attend Mary and Tom’s wedding ceremony?
-Yes，but as you know，they________each other no more than 3 months．
| A．knew | B．had known | C．have known | D．have been knowr |
_____I like the color of the hat，I don,t like its shape．
| A．While | B．If | C．How | D．When |